【摘 要】
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Dear editor,rnRecently, the permutation-based cryptology becomes a good topic in symmetric-key research groups.Many dedicated ciphers are permutation-based, and
【机 构】
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Institute for Advanced Study, Tsinghua University, Beijing 100084, China;Department of Computer Scie
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Dear editor,rnRecently, the permutation-based cryptology becomes a good topic in symmetric-key research groups.Many dedicated ciphers are permutation-based, and researchers introduced lots of cryptographic permutations which were suitable for different applications (collision-resistant hashing, preimageresistant hashing, message authentication, message encryption, etc.).Frit (fault-resistant iterative transformation) is a new lightweight 384-bit cryptographic permutation proposed by Simon et al.[1] recently.Dobraunig et al.[2] first studied the Frit cipher against algebraic attacks and gave some key-recovery attacks on Frit in EM constructions.In the end of their study, they left an open problem that if Frit is used in MonkeyDuplex [3] construction (denoted as Frit-AE, i.e., Frit-based authenticated encryption), what is the security level of Frit-AE against the algebraic attacks, such as cube-like or conditional cube attacks.In this study, we focus on this open question.
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